MOTOR PUMP FOR LIQUID AND DISH WASHER USING IT

摘要

PROBLEM TO BE SOLVED: To provide a pump capable of transmitting pumping power between respective pump chambers and restricting cavitation phenomenon for maintaining the pumping power in a good condition and preventing generation of noise due to inclusion of bubbles. SOLUTION: The motor pump for liquid is provided with a first impeller 10 and a second impeller 6 having between them a diaphragm 23, through which a rotary shaft 3 is passed, with the rotary shaft 3 of a motor 2. A first pump chamber 21 and a second pump chamber 22 are formed by covering the first impeller 10 and the second impeller 6 by means of casings 4, 8, and 12 respectively. A communication means 24 allowing movement of bubbles between the first pump chamber 21 and the second pump chamber 22 is arranged, so that the pumping power by the first impeller 10 is differentiated from that by the second impeller 6.